Originally Posted by MotoMike
Tappet w/lock nut. Kind of a bitch the first couple times, but you get the routine down. Need a special angled feeler gauge.
Yep. Ignore the manual's concept of TDC and follow this video tutorial instead:
And if your experience is anything like mine on my '07 450, only the intakes will need adjustment, my exhausts never moved in over 300 hours. Fortunately, the intakes are the easiest to get to, and the exhausts are down in between the radiators and it's a tight squeeze to check them.